Accutrim™ 1240 (RJ26 Style)
Vishay Foil Resistors
Bulk Metal
®
Foil Technology Ultra High Precision Trimming Potentiometers,
1
/ " Square, RJ26 Style, Designed to Meet or Exceed The Requirements of
4
MIL-PRF-39035, Char. H with a Smooth and Unidirectional Output
Temperature coefficient of resistance (TCR):
± 10 ppm/°C. (- 55 °C to + 150 °C ref. at + 25 °C);
through the wiper
(3)
; ± 25 ppm/°C (see table 2 for
low values)
A smooth and unidirectional resistance with
leadscrew adjustment
Load life stability: 0.1 % typical
R,
1.0 % maximum
R
under full rated power at + 85 °C for 10 000 h
Settability: 0.05 % typical; 0.1 % maximum
Setting stability: 0.1 % typical; 0.5 % maximum, DSS
Power rating: 0.25 W at + 85 °C
Resistance range: 5
to 10 k
Tolerance: ± 5 %, ± 10 %
Electrostatic discharge (ESD) at least to 25 kV
Terminal finish: gold plated (tin/lead finish is available on
request)
FEATURES
INTRODUCTION
Vishay Foil Resistors’ (VFR) precision trimmers have the
Bulk Metal
®
Foil resistive element which possesses a unique
inherent temperature and load life stability. Plus, their
advanced virtually back lash-free adjustment mechanism
makes them easy to set quickly and accurately and keeps
the setting exactly on target.
Resistance
Resistance
BULK METAL
FOIL
WIREWOUND
Resistance
CERMET
Wiper Travel
Wiper Travel
Wiper Travel
TABLE 1 - MODEL SELECTION
MODEL
1240
TERMINATION STYLE
W-edge mount, top adjust
X-edge mount, side adjust
P-horizontal mount, side adjust
AVERAGE WEIGHT (g)
0.4
POWER RATING at + 85 °C AMBIENT
0.25 W
NO. OF TURNS
21 ± 2
Note
• See Figure 1, next page
TABLE 2 - 1240 (RJ26) SERIES
ELECTRICAL SPECIFICATIONS
Temperature Coefficient of
Resistance (TCR) 50
to 10 k
End-to-end
(2)
Temperature Coefficient of
Resistance 5, 10 and 20
Through the wiper
(3)
Stability
Load life at 10 000 h
End-to-end
(2)
Power Rating
Settability
Setting Stability
Contact Resistance
Variation - CRV (noise)
(5)
Hop-off
High-Frequency Operation
Rise time
Inductance
Capacitance
Operating Temperature Range
Document Number: 63053
Revision: 16-Oct-13
(4)
TABLE 3 - VALUES VS. TOLERANCES
STANDARD RESISTANCE VALUES
(in
)
5, 10
20, 50, 100, 200, 500, 1K, 2K, 5K, 10K
STANDARD
TOLERANCE
± 10 %
±5%
± 10 ppm/°C maximum
(- 55 °C to + 150 °C,
+ 25 °C ref.)
± 20 ppm/°C
± 25 ppm/°C
0.1 % typical
R
1.0 % maximum
R
(under full rated power of
0.25 W at + 85 °C)
0.25 W at + 85 °C
0.05 % typical;
0.1 % maximum
0.1 % typical;
0.5 % maximum
3
typical;
10
maximum
0.25 % typical;
1.0 % maximum
1.0 ns without ringing
0.08 µH typical
0.5 pF typical
- 55 °C to + 150 °C
TABLE 4 - MECHANICAL SPECIFICATIONS
Adjustment Turns
Mechanical Stops
Internal
Terminations
Case Material
Shaft Torque
Backlash
21 ± 2
Wiper idles - no discontinuity
All welded - no flux
1240X - diallyl-phthalate: green (DAP)
1240W - diallyl-phthalate: green (DAP)
1240P - thermoplastic: black
3 oz. in. maximum
0.005 % typical
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Accutrim™ 1240 (RJ26 Style)
Vishay Foil Resistors
FIGURE 1 - SCHEMATIC AND DIMENSIONS
in Inches (Millimeters)
1240X
0.040" (1.02 mm) C
1240W
0.050" (1.27 mm) C
0.040" (1.02 mm) C
VFR
0.250" (6.35 mm) D
VFR
1
CW
1
2
3
0.050" (1.27 mm) C
0.050" (1.27 mm) C
0.100" (2.54 mm) A
0.050" (1.27 mm) C
0.100" (2.54 mm) A
0.125" (3.18 mm) C
(bottom view)
0.100" (2.54 mm) A
0.010" (0.25 mm) A
0.050" (1.27 mm) C
0.100" (2.54 mm) A
0.250" (6.35 mm) D
CW
2
3
3
1
2
3
2
1
0.250" (6.35 mm) D
0.250" (6.35 mm) D
0.175" (4.45 mm) C
0.175" (4.45 mm) C
0.050" (1.27 mm) C
0.125" (3.18 mm) C
(bottom view)
1240P
0.050" (1.27 mm) C
VFR
0.175" (4.45 mm) D
1
CW
3
TOLERANCES:
A = ± 0.005" (0.13 mm)
C = ± 0.010" (0.25 mm)
D = ± 0.020" (0.51 mm)
STANDARD MARKING:
Model No.
Date Code
Resistance Value
Tolerance
0.055" (1.40 mm) C
0.035" (0.89 mm) C
1
2
3
0.250" (6.35mm) D
0.016"
(0.41 mm) A
Resistance
Value
Tolerance
NOTES:
Adjustment screw 0.080" (2.03 mm) diameter with
0.025" (0.64 mm) X 0.030" (0.76 mm) slot. Tolerance on
0.100" (2.54 mm) A
0.250" (6.35 mm) D
0.125" (3.18 mm) C
screw dimensions is ± 0.005" (0.13 mm). Model 1240
has gold plated terminal pins 0.016" (0.41 mm) ± 0.001"
(0.03 mm) diameter, 0.200" (5.08 mm) length minimum.
0.100" (2.54 mm) A
Model No.
Date Code
FIGURE 2 - POWER DERATING CURVE
FIGURE 3 - 1240W 10 k LOAD LIFE, 20 UNITS,
10 000 h at 0.25 W, + 85 °C (Wiper at CW)
+ 2000
Percent of Rated Power
+ 100
+ 75
+ 50
+ 25
0
- 75
+ 85 °C
+ 1500
+ 1000
ΔR/R
(ppm)
- 50
- 25
0
+ 25
+ 50
+ 75 + 100 + 125 + 150 + 175
+ 500
0
- 500
- 1000
- 1500
- 2000
0
2000
4000
6000
8000
10 000
Ambient Temperature °C
Time (h)
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For any questions, contact:
foil@vishaypg.com
Document Number: 63053
Revision: 16-Oct-13
Accutrim™ 1240 (RJ26 Style)
Vishay Foil Resistors
TABLE 5 - COMPARISON
MIL-PRF-39035/3 CHARACTERISTIC H
TEST GROUP I
Conditioning
Contact resistance variation - CRV (noise)
Immersion
TEST GROUP I a
Visual and mechanical
Actual effective electrical travel
End resistance
Dielectric withstanding voltage - DWV
Per MIL-STD-202, methods 301 and 105
Atmospheric pressure
Barometric pressure
Insulation resistance
Shaft torque
Thermal shock
Setting stability
TEST GROUP II
Solderability
TEST GROUP III
Resistance temperature characteristic - TCR
Moisture resistance
Contact resistance variation - CRV (noise)
TEST GROUP IV
Settability
Shock
Setting stability
Vibration
Setting stability
Contact resistance variation - CRV (noise)
Salt spray
TEST GROUP V
Solder heat
Low-temperature operation
Setting stability
Low-temperature storage
High-temperature exposure
Setting stability
Contact resistance variation - CRV (noise)
Integrity of shaft
TEST GROUP VI
Rotational life (200 cycles)
Contact resistance variation - CRV (noise)
Terminal strength
TEST GROUP VII
Life (2000 h) at + 85 °C
Life (10 000 h) at + 85 °C
TEST GROUP VIII
Solvent resistance
± 1.0 %
± 3.0 % or 3
(7)
No continuous stream of bubbles
No failures
10 to 25 turns
2 % or 2
(7)
MODEL 1240 MAXIMUM
(6)
± 0.5 %
3
typical,
10
maximum
No continuous stream of bubbles
No failures
21 ± 2 turns
2
for
values
1 k;
5
for
values
2 k;
600 V
AC
, 1 min
250 V
AC
, 1 min
> 1000 M
3 oz. in. maximum
± 0.5 %
± 0.5 %
Per MIL-STD-202, method 208
± 0.001 %/°C (± 10 ppm/°C)
± 0.5 %
3
typical,
10
maximum
± 0.1 %
± 0.5 %
± 0.5 %
± 0.5 %
± 0.5 %
3
typical,
10
maximum
No corrosion
± 0.1 %
± 0.5 %
± 0.5 %
± 0.5 %
± 0.5 %
± 0.5 %
3
typical,
10
maximum
No loosening or breakage
± 2.0 %
3
typical,
10
maximum
2 lbs.
± 0.1 % typical, ± 1.0 % maximum
± 0.1 % typical, ± 1.0 % maximum
No failures
600 V
AC
, 1 min
250 V
AC
, 1 min
1000 M
3 oz. in. maximum
± 1.0 %
± 1.0 %
Per MIL-STD-202, method 208
± 0.005 %/°C (± 50 ppm/°C)
± 1.0 %
3.0 % or 3
(7)
± 1.0 %
± 1.0 %
± 1.0 %
± 1.0 %
± 1.0 %
3.0 % or 3
(7)
No corrosion
± 1.0 %
± 1.0 %
± 2.0 %
± 1.0 %
± 3.0 %
± 2.0 %
3 % or 3
(7)
No loosening or breakage
± 2.0 %
3 % or 3
(7)
2 lbs.
± 3.0 %
± 5.0 %
No failures
Notes
(1)
Maximum is 1.0 % A.Q.L. standard for all specifications except
TCR. (For TCR information, see notes 2 and 3.)
(2)
Maximum TCR applies to the 3
(sigma) limit or 99.73 % of a
production lot. (Measured end-to-end with wiper off the element.)
(3)
Measurements of TCR through the wiper are influenced more by
setting stability and the percentage of the total resistance in use
(at the wiper) than by fundamental resistance change due to
temperature alone. The parameter shown in table 2 is a 2 s
distribution typifying the behavior of the device when used with
40 % or more of the total resistance in use.
(4)
Derated linearly for full power at + 85 °C to zero power at
+ 150 °C. See Figure 2 on previous page.
(5)
Independent of resistance value. 3
maximum available on
special request.
(6)
All
R’s
are measured to the tolerance specified + 0.01
.
(7)
Whichever is greater.
Special Available Options:
Special marking
Burn-in and screening operations.
Document Number: 63053
Revision: 16-Oct-13
VFR TRIMMERS ARE INSPECTED
100 % for:
• Immersion
• Resistance tolerance check
• End resistance
• Visual-mechanical
• Dynamic tests for continuity, CRV
By sample for:
• TCR
• DWV
For any questions, contact:
foil@vishaypg.com
www.vishayfoilresistors.com
3
Accutrim™ 1240 (RJ26 Style)
Vishay Foil Resistors
TABLE 6 - GLOBAL PART NUMBER INFORMATION
NEW GLOBAL PART NUMBER: Y4053500R000J0L (preferred part number format)
DENOTES PRECISION
Y
VALUE
R
=
K
= k
CHARACTERISTICS
(1)
0
= gold plated termination (lead (Pb)-free)
1 to 999
= custom
Y
4
0
5
3
5
0
0
TOLERANCE
J
= ± 5 %
K
= ± 10 %
R
0
0
0
J
0
L
PRODUCT CODE
4053
= 1240W
5053
= 1240X
0053
= 1240P
PACKAGING
L
= foam/box pack
FOR EXAMPLE: ABOVE GLOBAL ORDER Y4053 500R000 J 0 L:
TYPE: 1240W
VALUE: 500.0
ABSOLUTE TOLERANCE: ± 5.0 %
TERMINATION: gold plated termination (lead (Pb)-free)
PACKAGING: foam/box pack
HISTORICAL PART NUMBER: 1240W 500R00 J B (will continue to be used)
1240W
MODEL
1240W
1240X
1240P
Note
(1)
500R00
RESISTANCE VALUE
500R00
= 500.0
J
TOLERANCE
J
= ± 5 %
K
= ± 10 %
B
PACKAGING
B
= foam/box pack
For non-standard requests, please contact application engineering.
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Document Number: 63053
Revision: 16-Oct-13
Legal Disclaimer Notice
Vishay Precision Group
Disclaimer
ALL PRODUCTS, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE.
Vishay Precision Group, Inc., its affiliates, agents, and employees, and all persons acting on its or their
behalf (collectively, “Vishay Precision Group”), disclaim any and all liability for any errors, inaccuracies or
incompleteness contained herein or in any other disclosure relating to any product.
The product specifications do not expand or otherwise modify Vishay Precision Group’s terms and
conditions of purchase, including but not limited to, the warranty expressed therein.
Vishay Precision Group makes no warranty, representation or guarantee other than as set forth in the terms
and conditions of purchase.
To the maximum extent permitted by applicable law, Vishay Precision
Group disclaims (i) any and all liability arising out of the application or use of any product, (ii) any and
all liability, including without limitation special, consequential or incidental damages, and (iii) any and
all implied warranties, including warranties of fitness for particular purpose, non-infringement and
merchantability.
Information provided in datasheets and/or specifications may vary from actual results in different
applications and performance may vary over time. Statements regarding the suitability of products for
certain types of applications are based on Vishay Precision Group’s knowledge of typical requirements that
are often placed on Vishay Precision Group products. It is the customer’s responsibility to validate that a
particular product with the properties described in the product specification is suitable for use in a particular
application.
No license, express, implied, or otherwise, to any intellectual property rights is granted by this document, or
by any conduct of Vishay Precision Group.
The products shown herein are not designed for use in life-saving or life-sustaining applications unless
otherwise expressly indicated. Customers using or selling Vishay Precision Group products not expressly
indicated for use in such applications do so entirely at their own risk and agree to fully indemnify Vishay
Precision Group for any damages arising or resulting from such use or sale. Please contact authorized
Vishay Precision Group personnel to obtain written terms and conditions regarding products designed for
such applications.
Product names and markings noted herein may be trademarks of their respective owners.
Document No.: 63999
Revision: 27-Apr-2011
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